4-去乙酰基长春花碱 、
benzyl 5-(1-chlorosilolan-1-yl)pentanoate 在
咪唑 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 5.5h,
以25 mg的产率得到(3aR,3a
1R,4R,5S,10bR)-methyl 4-((1-(5-(benzyloxy)-5-oxopentyl)silolan-1-yl)oxy)-3a-ethyl-9-((5S,7R,9S)-5-ethyl-5-hydroxy-9-(methoxycarbonyl)-2,4,5,6,7,8,9,10-octahydro-1H-3,7-methano[1]azacycloundecino[5,4-b]indol-9-yl)-5-hydroxy-8-methoxy-6-methyl-3a,3a
1,4,5,5a,6,11,12-octahydro-1H-indolizino[8,1-cd]carbazole-5-carboxylate